Model JTX

Foodservice Tankless Electric Booster Heater

Available up to 54 KWSingle or Three Phase Voltages

The Hubbell model JTX Tankless electric booster heater is a highly reliable and easily maintained heater designed for operation in your commercial kitchen. The Hubbell JTX Tankless heater is compact, extremely efficient, takes up no floor space, and reduces operating costs. Hubbell's vast experience, meticulous engineering and advanced technology ensure that you can rely on the model JTX for your sanitizing rinse needs. The Hubbell JTX Tankless Booster Heater is the right choice for your booster heating requirements, as you will be providing your customer with a quality product that is long lasting, trouble-free and energy efficient.

Over 98% efficient and saves over 2300 kW hours per year compared to tank type booster heaters

The Hubbell Model JTX electric tankless booster heater contains high powered heating elements that heat water only when there is demand from the dishmachine. When hot water is needed, a built in flow sensor measures the exact flow rate and that data combined with temperature readings at the heater's inlet and outlet are processed by the electronic temperature controller. This data is continuously transmitted to the temperature controller, which constantly calculates the precise amount of power (kW) needed to achieve the desired temperature. A zero cross over firing signal is sent to the heater's fast acting triacs in order to modulate the heating elements to the precise level needed to meet demand. The Hubbell tankless booster heater uses only as much power as is needed, while delivering accurate and consistent hot water temperature.

Note: The Hubbell Model JTX is designed for use with conveyor and flight type dish machines. This product is not intended for use with door style dish machines.

Heater Overview

Tankless Booster Saves Money

Energy Savings

By heating water more efficiently...over 98% efficient...and essentially eliminating standby heat loss, the typical owner will save over 2300 kW·Hrs per year! Add to that the reduced maintenance costs of the Hubbell tankless booster compared to a tank type booster and the annual savings easily add up to over $750 per year.
2300 kW·Hrs x $0.16 per kWh = $368.00 Annual Energy Savings

Space Saving:

Free up floor space, improve the look and cleanliness of your kitchen, and improve the longevity of your booster when you mount the Hubbell tankless on the wall.

General Specifications

Temperature Controller

A sophisticated electronic temperature controller with LED digital display provides the user interface. The temperature controller processes all flow and temperature data and calculates the precise amount of power needed to meet demand.

Operator Control Capabilities

Power Limiting:

Allows the operator to reduce the power consumption by any percentage to provide installation and operational flexibility and savings.

Determine the exact cost of operating the heater. Input your cost per KWÂ·Hr and the controller displays total KWÂ·HRs consumed, total cost of operation, and total hot water usage (shown in gallons or liters).

Temperature Control:

Set the digital display to the desired water temperature in °F or °C.Â Fully adjustable in 1° increments from 32-194°F (0-90°C). A user adjustable +/- 3° calibration feature provides additional control for superior accuracy.

Full Heater Modulation

Each heating element is switched on/off using a fast acting solid state triac with zero cross over firing control. This switching schema provides full modulation of each heating element, ensuring that the precise amount of heat is added to meet demand. To improve operating efficiency and component longevity, each triac is mounted to a heat sink located on the incoming supply piping so that heat generated by the triac during the switching process is dissipated into the water.

Proper Power Integrity

All Hubbell tankless water heaters, including all 3 phase models, are engineered to operate as a balanced load and operate at 0.999 Power Factor. All Hubbell 3 phase models are designed for 3 wire (3 live, 1 ground) and 4 wire power systems and draw equal current across all conductors to maintain the power integrity of the users electrical system. Hubbell does not recommend the use of heaters that operate as an unbalanced load, as is common with staged heaters designed for star systems (3 live, 1 neutral, 1 ground) that require use of the neutral leg.Â All load switching in Hubbell tankless models is performed as zero cross over, eliminating phase angle firing interference and associated EMI issues.

Full Resource Staging

The Hubbell tankless control schema ensures that usage is equalized across all heating circuits. To achieve this, once the controller has calculated the precise amount of kW required, all circuits are energized in a staggered fashion such that each circuit is proportionally and independently energized and then time staggered between circuits. This Full Resource Staging Schema reduces EMI output, increases component longevity, and provides highly accurate and consistent hot water temperatures.Â For three phase models, all circuits are fully modulated and synchronized to operate as a balanced load.

Building Management Integration

Remote Control:Ability to remotely enable or inhibit the heating operation of the unit using one of the following two methods:1. Customer supplied 24VDC signal is user configured for either Inhibit Mode or Normal Operation Mode.2. Customer supplied volt free contact is user configured for either Inhibit Mode or Normal Operation Mode.

Priority Control: An integrated SPDT potential free dry contact (NO/NC 10A @ 240VAC) energizes when the unit is heating and de-energizes when not heating. This feature is useful when it is desirable to give the water heater priority over another electrical load to ensure that both are not operational at the same time.

Notes:
Alternate voltages including 277, 380, 415, 440 and 575 volt available. Please contact us directly for exact KW availability in these voltages.
Unshaded flows specify Base Model JTX, shaded flows must specify Base Model JHX due to flows exceeding 8 GPM.
The Hubbell Model JTX is designed for use with conveyor and flight type dish machines and is not intended for use with door style dish machines.

Step 1

Step 2

Choose the Tankless model with the KW rating which meets the peak demand (GPH) and required temperature rise (°FΔT) for your application.

Step 3

Choose the supply voltage available. Note the maximum amperage draw of the unit and verify availability.

Voltage De-Rating Factors

Rated Voltage

Applied Voltage

De-Rating Factor

600 V

575 V

92%

600 V

550 V

84%

480 V

460 V

92%

480 V

440 V

84%

240 V

230 V

92%

240 V

220 V

84%

240 V

208 V

75%

When the actual supply voltage (applied voltage) is different than the design voltage (rated voltage) the resulting KW output will be affected. Please see the chart for typical voltage de-rating factors, or use the following formula.
(Applied Voltage² ÷ Rated Voltage²) x Rated KW = KW output at applied voltage

The Hubbell Model JTX tankless booster heater is designed for use with conveyor and flight type dishmachines. If the dismachine is not listed, or if the application is other than a conveyor or flight type dishmachine, please contact us directly for assistance.

All sizing shown are that of the dishmachine manufacturers. Hubbell is not responsible for incorrect sizing applications.
For outdated models or dishmachines not listed consult Hubbell for recommended tankless booster size.
This selector chart is based upon 40°F and 70°F temperature rises, and 20psi flow.
All booster heaters are rated at 100% of the capacity of the dishwasher as recommended by the National Sanitation Foundation.

Optional Equipment

Water Treatment System: Provide superior mineral scale prevention and corrosion control by feeding a special blend of scale control compounds into the hot water stream before the booster. The in-line system includes a clear cartridge housing to allow an operator to view the cartridge and determine when it needs replacement without the need to open the system.

Shock Absorber: Reduce the harmful pressures resulting from quick closing dishwasher solenoid valves by installing a shock absorber between the booster and the dishwasher.

T&P Relief Valve for installation in the hot water outlet piping. (May be required by local code)

Remote Control Display allows heater to be installed in a remote location. The 3" x 5" NEMA 4 display enclosure can be located up to 250' from the heater and gives the operator full remote control and monitoring capabilities

Example:

JTX024-3T4

Model JTX Specific Questions

How small is the Hubbell electric tankless water heater?

About the size of an average briefcase. The Hubbell tankless water heaters are a fraction of the size of a conventional storage tank type water heater and they mount on the wall, so you can reclaim 100% of the floor space once occupied by your conventional water heater.

Does the Hubbell electric tankless water heater restrict water flow?

No. Hubbell electric tankless water heaters do not restrict water flow. Other brands may incorporate a flow restrictor device within their tankless heater or require a flow restricting device be installed in the plumbing or fixture itself as a method for controlling temperature. This is not the case for Hubbell electric tankless water heaters.

How is a tankless heater different from a storage tank heater?

A storage tank water heater maintains a tank full of hot water 24/7/365 and will heat water even during periods of no usage in order to make up for standby heat loss. A tankless water heater only consumes power (whether its gas or electric) when there is demand for hot water. They take up significantly less space and typically can be located close to the point of use, thus providing more efficient delivery of hot water. Tankless water heaters provide continuous hot water and never run out as long as the heater capacity is not exceeded.

How does my water heater ship?

All Hubbell storage type water heaters ship via common carrier and are classified by the Commodity Classification Standards Board under National Motor Freight Classification (NMFC) class 100. Each water heater is palletized and wood crated. All Hubbell tankless water heaters, when transported using common carrier, ship class 77.5. To provide the lowest transportation cost, in most cases the shipment is made on Hubbell’s account and the freight cost is added to the invoice, commonly referred to as “Pre pay and add”. For very large shipments, the most economical method (LTL or Dedicated Truck) for transporting the water heaters to the final destination will be analyzed by Hubbell's transportation department.

What is the purpose of a hot water booster heater?

The primary function of a booster heater is to provide 180°F (82°C) hot water for the final sanitizing rinse in a commercial dishwasher.

General Questions

Where can I purchase a Hubbell water heater?

There are numerous ways to purchase a Hubbell water heater depending upon the model you desire and your geographic location. The easiest way is to contact Hubbell directly at 800-647-3165 and ask for the sales department where you will be directed to either our local representative or our order entry department for quick and easy ordering.

Where can I purchase replacement parts?

Parts are available for your Hubbell water heater direct from the factory. Please call 800-647-3165 and ask for our parts department. Please have your model and serial number handy.

I don't see the size or feature I need, what do I do?

Hubbell has more than 35 product families available in over 4,000,000 configurations. There are numerous features, configurations and ratings we provide but for practical reasons are are not listed in the sales brochure. If you have a specific requirement and you do not see it in the brochure, please contact a Hubbell Sales Engineer...chances are we have what you need.

What should I know about Legionella disease?

Legionella is the bacteria responsible for Legionnaire’s Disease, an acute bacterial infection of the lower respiratory tract. This bacterium was first identified in 1977 by the Centers for Disease Control as the cause of an outbreak of pneumonia that caused 34 deaths at a 1976 American Legion Convention in Philadelphia. Pontiac Fever is a less severe, non-pneumonia, flu-like disease that is associated with and likely caused by Legionella bacteria. Legionella is a fairly common water bacterium and has been found to exist widely in many surface water sources including lakes, rivers, streams and ponds. It can also be found in ground water sources and some soils. At the levels found in these naturally occurring sources it typically does not pose a threat to public health. When the bacterium enters a domestic water system it can find an ideal host environment of warm water temperatures (105-115°F), stagnant water areas (isolated storage tanks and dead-end piping legs) and ample food sources (sediment, scale, deposits and biofilm). Under these conditions Legionella can rapidly colonize, forming higher concentrations that can pose the public health threat of Legionnaire’s Disease. There are many methods of controlling colonization of Legionella bacteria. However, a widely accepted and preferred method is to maintain the hot water system storage temperature continually at or above 140°F. Unfortunately, the elevated temperature necessary to minimize the growth of and kill Legionella bacteria has the potential to cause serious thermal shock and scalding injuries. As such, many plumbing engineers will specify that the water heater be set to maintain water temperatures at 140°F or higher to reduce the risk of Legionella, but then specify the appropriate mixing valve to ensure safe delivery of hot water to the fixtures. For a more thorough discussion of Legionella please go to here and the following link to the US Department of Labor OSHA information regarding Legionnaires’ Disease OSHA here

My question is not found in these FAQ’s, where do I look next?

Check out the Hubbell Product Center at Here for a complete listing of all technical documentation available by model. Get easy access to Installation, Operation & Maintenance manuals, Sales Brochures, Service Bulletins, Wiring Schematics, Parts Breakdowns and various other technical documents related to the full line of Hubbell water heaters. Or, if you prefer, please call us at 800-647-3165 and ask to speak to a Sales Engineer.

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Model JTX Specific Questions

Where can I purchase replacement parts?

Parts are available for your Hubbell water heater direct from the factory. Please call 800-647-3165 and ask for our parts department. Please have your model and serial number handy.